恒阻大变形锚索弹塑性力学分析

doi:10.13722/j.cnki.jrme.2017.0977

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摘要恒阻大变形(CRLD)锚索已广泛应用于许多边坡的预警和加固。为了分析恒阻大变形锚索的恒阻力，根据恒阻器的形状和尺寸，将其看作类似厚壁圆筒问题进行处理。厚壁圆筒问题不同于经典拉梅和薄壁圆筒两种问题，研究时需考虑径向应力及切应力对恒阻力的影响，为此建立三维弹塑性力学模型进行分析求解。若引入平面应变假设，则该三维解析模型回归为二维经典拉梅公式。为验证此方法的合理性，进行三组恒阻大变形锚索的拉伸实验，并将三维弹塑性模型所得恒阻力值与二维弹塑性模型及拉伸试验结果进行对比，三维弹塑性力学模型的解更接近室内实验力值，该模型可用于估算各种型号CRLD锚索的恒阻力值，并可为其优化设计提供理论支持。

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	吕谦1
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	陶志刚1
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	李兆华1
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	何满潮1
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	安文博3

关键词 ：边坡工程, CRLD锚索, 吸能锚杆, 厚壁圆筒, 静力拉伸试验, 三维弹塑性力学模型

Abstract：Constant-resistance-large-deformation(CRLD) cables have been widely applied in a large number of slopes for monitoring and reinforcement. In order to analyze the constant resistance of the CRLD cable，it is considered as a thick-walled cylinder problem according to the shape and the dimension of the pipe. Differing from the classical Lame equation and thin-walled cylinder issues，this study took into account the effects of axial and shear stresses，and established a 3-dimensional elasto-plastic analytical model. The 3D analytical model became the Lame equation in 2D under the plane strain assumption. In order to verify this analytical model，static tension tests were performed to 3 samples with different geometric parameters. The experimental results were compared with 2D and 3D analytical models. The calculated results with 3D model was close to the experimental data. The 3D analytical model can be used to estimate the constant resistance of different CRLD cables and for optimal design.

Key words： slope engineering;CRLD cables;energy-absorbing cables;thick-walled cylinder problem;static tension test;3D elasto-plastic analytical model

引用本文:

吕谦1，2，陶志刚1，2，李兆华1，2，何满潮1，2，安文博3. 恒阻大变形锚索弹塑性力学分析[J]. 岩石力学与工程学报, 2018, 37(4): 792-800.
LV Qian1，2，TAO Zhigang1，2，LI Zhaohua1，2，HE Manchao1，2，AN Wenbo3. Elasto-plastic analysis of large deformation cables. , 2018, 37(4): 792-800.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0977 或 http://www.rockmech.org/CN/Y2018/V37/I4/792

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